Hydraulic Axial Piston Pump: Open-Loop Control 350 Bar for Die-Casting Machines

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Competitive Advantage:

1. The A4VSO hydraulic pump is certified to multiple international standards—including CE marking for European compliance, UL and CSA certifications for North American safety, and API qualifications for petroleum sector applications—ensuring seamless market entry and regulatory adherence across the globe. OEMs and end users in industries ranging from oil & gas to food & beverage processing can deploy the pump without encountering additional certification barriers. The broad regulatory acceptance underlines the pump’s robust design and commitment to safety, facilitating higher confidence among project engineers and procurement teams when specifying power units for critical infrastructure and industrial projects.

2. Incorporating internal exhaust silencing and specialized low‑noise chamber separation techniques, the A4VSO piston pump maintains noise emissions within stringent factory and workplace thresholds, even under high flow and high‑pressure conditions. These acoustic design features reduce airborne and structure‑borne noise, creating a more ergonomic environment for operators and complying with Occupational Safety and Health Administration (OSHA) and European Noise at Work regulations. Applications in enclosed or noise‑sensitive areas—such as textile mills, pharmaceutical clean rooms, and urban construction sites—benefit from quieter hydraulic operation without sacrificing performance or efficiency.

3. The A4VSO axial piston pump features multi‑stage internal filtration and dedicated oil‑circuit isolation to capture and divert contaminants away from critical tolerances, reducing wear on valve spools and cylinder blocks. By effectively managing particulate ingress—even in harsh environments like metalworking, foundry operations, and recycling plants—the pump extends service intervals and lowers overall maintenance expenses. Plant operators gain improved uptime and reduced risk of catastrophic failure due to contamination‑induced damage, making the hydraulic pump an invaluable asset in mission‑critical production lines requiring high fluid cleanliness.

The Analysis For Rexroth A4VSO Piston Pump Common Breakdown:

1. High‑pressure fitting torque incorrect: Improper torque during assembly of high‑pressure hose fittings—either under‑torqued or over‑torqued—can result in intermittent leaks or damage to fitting threads and sealing faces. Under‑tightening causes oil seepage, while over‑tightening may crack the hose fitting body or strip threads, leading to catastrophic failure. Use a calibrated torque wrench and adhere to SAE or ISO torque specifications for each fitting type to ensure proper preload and maintain secure sealing on the hydraulic pump’s discharge connections.

2. Blocked reservoir breather causing suction issues: If the reservoir breather at the oil tank top becomes clogged with dust or sludge, the tank cannot equalize pressure with the atmosphere, resulting in negative pressure. This vacuum condition hampers the pump’s suction capability and may induce cavitation by drawing in air. Operators should routinely clean the breather filter or install an external filtered breather to maintain unobstructed air exchange between the reservoir and ambient environment, thereby preserving reliable hydraulic supply to the axial piston pump.

3. Difficulty starting with high‑viscosity oil: In cold environments or when using high‑viscosity hydraulic fluids, failure to engage the low‑viscosity start mode or pre‑heating measures can significantly increase starting torque requirements. This may overload the starter motor and cause the pump barrel to bind. Early indicators include abnormally high startup current draw and sharp whining noise. Implement electric oil heating or limit startup viscosity to ISO VG 150 or below, then transition to normal operating viscosity once the pump reaches temperature, ensuring reliable cold‑start performance of the hydraulic pump.

Shaoyang Victor Hydraulic Co., LTD. (formerly Shaoyang Hydraulic Parts factory), founded in 1968, is one of the three pillar enterprises of china's hydraulic industry directly under the former Ministry of Machinery industry, the national fixed-point production of hydraulic components, cylinders, complete sets of hydraulic system demonstration enterprises. is china's high pressure piston pump manufacturing pioneer.

The company brings together advanced manufacturing processing machine tools and a variety of testing and inspection equipment, and the products have high reliability and consistency. Adhere to independent innovation, excellence, cylinder, high-pressure piston pump, system in many fields has been a batch supporting industry leader enterprises. Shao Ye independent innovation research and development products are the National Development and Reform Commission, the Ministry of industry and information Technology, the Ministry of Science and Technology and other ministries key support import substitution projects, at the same time is the national high-tech enterprise, the national intellectual property advantage enterprise, the national specialized, refinement, differential and innovation "Little Giant" enterprise.

At present, Shao Ye independent core products and solutions are widely used in water conservancy, military, lithium electricity, metallurgy, forging, pile foundation, Marine engineering, construction machinery and other industries and a number of national major projects.